Typical costs for housecleaning in the neighborhood?

[supersojo.livejournal.com]

What are going rates for house cleaning in the Somerville area?  I suppose the real question may be more like, what is common practice in pay per hour, or by square footage... I'm new at this, have mercy on me.

My place is the upstairs condo of a two floor house: LR, DR, K, 1BA, 2BR, approximately 1100 sq feet. The first quote I received was assuming 1.5 to 2 hours per session.

Thanks.